package com.zto.design.observer.jdk;

import java.util.Observable;

/**
 * @program: sch-diy-parent
 * @description:
 * @author: sch
 * @create: 2020-11-27 16:59
 **/
public class ConcreteObservable extends Observable {
    public ConcreteObservable() {
        this.setChanged();
    }
}
